I would tell her that, since you knew she was going to have to reprint it anyway for the lossessive errors and the single spacing (you have to send stuff double spaced to editors), and it was getting hard on your eyes reading the single spaced document, here are your notes for what you did complete:

Then tell her again how you liked the beginning etc. Then i would speed read the ending and a few other spots and give opinions on those.

Good luck!